Electromagnetically-operated switch.



C. B. LARZELERB. ELEGTROMAGNBTIOALLY OPERATED SWITCH.

APPLIUATION mum AUG. 2, 1910.

Patented Jan. 17, 1911.

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' as the closing of the contactor has become efi'ec UNITED STATES PATENT orrion.

CHARLES B. LARZELERE, OF SENECA FALLS, NEW YORK, ASSIGNOR 'ifi GENERAL ELEC- TRIC COMPANY. A UURPGRATION OF NEW YORK.

ELECTROMAGNWTICALLY-OPERATED SWITCH.

982,14-fi. p c a of letterslatent- I Patented Jan. 1'7, 1911. Application filed August 2, 1810. Serial 110.575.0967.

To oil whom it may concern: To the above end, my invention consists. lieit known that i, Gimnnns LARZELERE, generally speaking, in providing a contactor a ctizei; of the United States, residing at and auxiliary switch attachment with a latch Seneca Falls, county of Seneca, State of mechanism arranged to hold the auxiliary New York, have invented certain new and switch in its open position, the mechanical b useful lmprovemcnts in Electromagneticonnection between the contactor and the wily-Operated Switches, of which the folauxiliary switch attachment being such that lowmgas a. specification. the latch mechanism is tripped during the My invention relates to clectromagnetilast part of the closing movement of the con- CTE , cally operated switches, and particularly toa tactor. 65 switch or contactor provided with a relay at- My invention will best be understood from 1 tachment and adapted for use in connection the followingdescription, taken in connecwith systems of motor control cf the general tion with the accompanying drawing, in type covered by an application filed bv wlnch- Ida d White and Eugene R. Carichotl Figure 1 is a side elevation, partly in sec- 70 beinil No.- 480,483, filed February 57, 1909, tion With certain parts broken away, of a and assigned to the same assignce as this upcontactor and auxiliary switch attachment plicjition. provided with my invention; and Fig. 2 is a p in systems of control ofthe "type covered fragmentary side elevation of a. portion of by the ayplication above referred to, in the the mechanism shown in Fig. 1 showing the 7 case of both those contactors which initially relative position of certain parts after the complete the motor circuit and those concontactor has closed and tripped the latch tactors which cut out section by section the mechanism and the auxiliary switch has resistance interposed in the motor circuit in moved to its closed position.

starting, the magnetizing coil or" the coiiper- Referring to the drawing, the various ating auxiliary switch attachment generally parts of the" contactor and auxiliary switch receives its increased current only after the or relay attachment are shown as mounted contacter has actually closed. It may hap upon a back 5 of slate or other insulating pen, therefore, in some arrangements unless material. The actuating coil of the conmeans is provided for preventing it, that a tactor is shown at (3 mounted upon a core contactor during the first part of its closing. 7 of magnetic material which is part of the .moven'ient will allow the auxiliary switch field frame 8 of the contactor which is seto move in a closing direction to certain cured to the back 5 by bolts 9, or in any extent before the increase of current due to other suitable manner. L

"The movable contact member of the 0011 tactor comprises an L-shaped armature 12,

pivoted at 13 in the field frame and carrymg the movable contact element. This con tact element comprises a finger 14 pivoted at 15 on a casting 16 secured to the arma- 5 ture 12 by bolts 17 or in any other suitable manner. The finger 14, which carries a removable tip 19, is biased in a counter-clock;

Wise direction by a spring 20, this movement being limited by the heel 20 which engages with shoulder 21, all arranged as shown.

The fixed contact member of the contactor comprises a bracket 23 secured to the back 5 by bolts 24, said bracket being provided with a removable tip 25 so arranged as to cooperate with the tip 19 of the movable contact member.

Thecontactm is shown' as provided with a blow-out device which comprises a blow out coil 27 located Within an arc chute 28 11-5 'tive in the electromagnet of the auxiliary witch att'iclinient. Under some conditions this n'riy render the control of the auxiliary :rwitchcs' by their electromaguets somewhat "HP uncertain, and for the purpose of overcoming leis possiblcdet'ect certain arrangements have ir-eenprovided which are covered in applicatims tiled by Harold E, White, Serial No. 480 481, file ll .ljebrnary 2?, 1962-), and Sef2, filed February 27, 1909,

are assigned to the same assignce as the present application.

It is an object of the present invention to pro'vide, in connection with a contactor hav-' ing an auxiliary switch attachment, another new and improved arrangement for preventing the auxiliary switch from closing before'. the current in its cooperating electromagnct has received the increase of current due to the closing of the contactor.

of any well-known l'orm having pole pieces 2!.) embedded in the sides thereol and held. by, a bolt 30 passing through the blowout coil 27. One terminal 32 ot the blow-out coil is electrically connected to the bracket and the other terminal is shown at 33.

The finger ll. of the contactor is connected by a llexiblc lead to any suitable point on the contactor frame or a bus-bar. The path of current through the contactor when the fame is closed is, therefore, through the lead 35. linger ll, tip 19, tip 25, bracket and blow-out coil 27.

The auxiliary switch attachment or relay, which will now be described, is in many respects similar to the arrangements shown in the applications above referred to. The magnet frame of the auxiliary switch attachment is shown at =l0 secured to the frame 8 of tl c contactor by a bolt 41.

The movable contact member of the auxiliary switch attachment comprises a core ll) of magnetic. material carrying a contact disk l -l. The core is arranged for sliding movement through a hole in the lower part of the magnet irame l-O, and said core at its 'pper end is provided with a rodeo which slides in a hole in the upper part of the frame 10. This rod l5 has a disk. 46 secured to its upper end and with this disk the heel 17, extending from the armature 12, engages. I

Cooperating with the movable contact member of the auxiliary switch attachment is a latch mechanism which comprises an L-shaped latch member 50 pivoted at 51 in lugs on the top of the magnet frame 40. This latch membe' 5G is biased to the position shown in Fig. 1 by a spring 59 located between the top of the magnet frame and a bracket secured to the latch member. This latch member is so arranged that the heel t? oi the armature 12 of the contactor will engage said latch during the last part oi? the closing movement of the movable member of the contactor so as to trip the latch member 50 from the position shown in Fig. 1, in which it engages the disk 16, to the position shown in Fig. 2 in which the latch member is out of the path. of said disk.

The magnet coil of the auxiliary, switch attachment may be ot. any suitable form and in the arrangement shown consists ot' a single turn of heavy conductor or bus-bar 55, to which the end of the flexible lead 35 is connected by being bolted between said.bus bar and the frame '0 by the bolt ll, as shown in the drawing. The, contact disk 4st bridges fixedeontacts 56 in a manner clear front the d ra wing.

The mode o't operation of the contactor and auxiliary switch attachment will be ob;

vious from the foregoing description. Vhen the contactor opens the heel -17 of the arm: ture 1i engages with the disk 46 and the core of the relay attachment is lifted to the position shown in Fig. 1, in which the contact disk 11 is out of engagement with the fixed contact members 515. ts long as the contactor is in its open position, the heel 4:7 will be in the position shown in Fig. 1, and the upper end of the latch member 50 will be in the path of and below the disk 16. When the magnet of the contactor is energized and the contactor closes its contacts, the initial downward movement of the heel t? will not influence the latch member 50 which will engage with the disk at; and will hold the longitudinally movable member of the relay attachment in its raised position. \Vhen, however, the armature 12 of the contactor has moved to such a position that the contact tips 19 and 25 are brought into engagement and the wiping action of one upon the other commences, the heel -'17 engages with the latch member 50 and in its tinal movement forces. said latch. member against the tension of the spring to the position shown in Fig. 2, thereby rendering the relay attachment operatively independent of the contactor and subjectonly to the magnctiw ing elfect of the coil upon the core 43. \Vith this arrangement it is clear that the movable member of the relay is positively held in its raised position until the circuit controlled by the contactor has been completed and any increase of current in the coil 55, due to the closing of said contactor, has become effective.

It is, of course, to be understood that my invention may be applied to many styles of contactor and auxiliary switch attachments, and that the particular form of latch mechanism which I have shown is merely illustrative. In the following claims I intend to cover all modifications which come within the scope of my invention.

Vhat I claim as new and desire to secure by Letters Patent of the United States, is:

1. In combination a contactor, a relay, a mechanical connection between said contactor and said relay whereby said contactor in opening opens the relay contacts, and a latch mechanism for holding said relay open tripped by said contactor in closing.

In combination a contactor having a movable mombeiga relay having a movable member, a mechanical connection between the movable mcn'ibcr of the contactor and the movable member of the relay whereby said contactor in opening opens the relay contacts, and a latch mechanism for holding the movable member of the relay in its open position tripped by said movable member of the contactor in moving to its closed position.

3. In combination a contactor, a relay, a latch mechanism for holding said relay open, and a mechanical connection which connects said contactor and said relay and said latch mechanism whereby saidcontactor in opening opens the relay contacts and in closing trips the latch mechanism.

p 4. In combination a contactor having a pivoted member, a relay having a longitudi nally movable member, a latch mechanism for holding the longitudinally movable member inthe position in which the relay contacts are open, and a mechanical connection between said pivoted member and said longitudinally'movable member and vsaid latch mechanismwhereby said contactor in closing moves tle longitudinally movable member of the relay to its open position and in closing trips the latch mechanism and renders said relay operatively independent.

5. In combination a contactor having a fixed contact member, a movable contact member, and an actuating coil for moving said movable contact member into engagement with said fixed contact member, ofan auxiliary switch attachment comprising a fixed contact member, member, a magnet coil cooperating With the last mentioned movable contact member, a

latch mechanism for holding said last mentioned movable contact member in its open position, and a mechanical connection between the movable contact member of said contactor and the movable contact member and latch mechanism of said auxiliary switch at tachment whereby said contactor in opening opens the contacts of saidauxiliary switch attachment and in closing trips said latch mechanism.

In Witness whereof, I have hereunto set my hand this 22nd day of J uly, 1910.

CHARLES B. LARZELERE.

Vitnesses ERNEST E. LEE, Enw. Sommnnn,

a movable contact 

